Investigators with the St Lucie County Sheriff's office blocked off that stretch of roadway early Thursday morning where it happened as they gathered evidence.

The identity of the person who struck Riestra hasn't been released.

The victims' family says Riestra was born in Argentina and loved soccer, the tango and to barbeque. "We're going to miss him. He gave you a lot of love. He's a Christian man," said the victim's ex-wife, Ana Ocasio.

His stepson Omar Chez said his stepfather worked out of the Midway road post office for about 12 years. "He left way to soon. No one deserved that," said Chez.

Postal officials released a statement that reads,

“The accident is still under investigation. Our postal family is coping with the shock and loss of our co-worker who was a friend to many of us in Fort Pierce. Our thoughts are with his family.” --- Debra Fetterly, USPS spokesperson, South Florida District

The case remains under investigation with no decision at this time on the possibility of charges.